Dry indehiscent single-seeded fruit formed from bicarpellary syncarpous inferior ovary is

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Cypsela is dry, indehiscent, single seeded fruit develops from an unilocular, single ovulate inferior ovary of bicarpellary, syncarpous, gynoecium possessing basal placentation. The fruit wall develops from pericarp and thalamus and is thin and remains attached to the seed at one point, eg, Heltanthus. Caryopsis are dry, indehiscent, small, single seeded fruit develop from unilocular, single ovuled, superior ovary of multicarpellary gynoecium. It differs from typical achenes as their pericarp is completely fused wi